Ball-bearing.



No. 821,703. PATENTED MAY 29, 1906. R. 00mm). BALL BEARING.

APPLICATION FILED MAY 12. 1904.

nirnn STATES PATENT @FFJIQE.

ROBERT CONRAD, OF BERLIN, GERMANX.

BALlL-BEARBNG.

Specification of Letters Patent,

Patented May -29, 1906.

Application filed May 12. 1904. Serial No. 207,593.

annexed and vto the letters marked thereon.

The invention relates to that class of ballbearings which are provided with partition devices'or f cages placed between the balls, said partition devices or cages being adapted to act as vessels or receptacles for lubricating matter by the insertion therein of a material capable-of absorbing oil such, for example,

- as are shown and claimed in my application,

Serial No. 220,653, filed August 13, 1904..

' The object of said arrangement is to-prevent based on the use of this felt material, may be the wearing out of the parts between the pages or partition devices and the runningsurface and also between said partition de-.

vices or cages and the balls.

Said partition dev ces orcages' adapted as oil or greaseretainers may serve either for permanently lubricating'the bearings or they may only be used as spare lubricators in case of any obstruction or when the ordinary method of lubricating fails altogether. I

The present invention has for its object to further improve this new methodnamely,

by the production of suitable types of such.

partition devices or cages capable ofabsor'bmg or holding and giving out oil or fatty sub- In this respect, first of all, an im-' stances. portant improvement has been devised where y felt or material similar to felt is used to retain the oil or grease. The arrangement,

such that the latter is either employed a one without any-protection for use as partition devices adapted. as oil-retainers or the said pieces or sections -'of felt may be protected by wire or any other suitable material, when both the pieces or sections of felt and their protecting material together form the partition devices or the elements-of the cages or oil-retainers. Inthe latter case the oil-re tainer thus formed by the combination of felt and the protectin material may be employed either with or wit out end plates adjacent to the balls. In the accompanying drawings, Figure 1 is a side view of part of a ball-bearing having the present invention applied thereto. Fig.

2 is a side View of one of the partition devices separately. Fig. 3 is a face View of one of theend plates thereof. Fig. 4 is a horizontal section taken on the line 1 1 of Fig. 3. is a side view of the trough-shaped body separately. Fig. 6 is an under side view thereof. Fig. 7 is a transverse section taken on the line 2 2 of-Fig. 5. Fig. 8 is'a side view of a modified trough or body.' Fig. 9 is an under sideview thereof. Fig. 10 is a transverse section taken on the line 3 3 of Fig. 8

further modification. Fig. 12 is an under side vie thereof, and Fig. 13 is a transverse sectio .iken on the line 4 4 of Fig. 11.

ed according to the present invention where- Fig'. 5

Fig. 11 is a side view of a .trough or body, illustrating a The drawings illustrate a device construct in thepieces or s'ectlons of felt' or like mate-' rial capable of retaining oil are arranged in combination with the protecting material and end plates.

Fig. 1 represents part of a ball-bearing and I illustrates the application thereto of the partition devices containing oil or rease or of the elements of the cage, ma e of felt or the like material, between the balls of the bearing. The ball-bearing itself according to this example of the invention is formed by an inner ring I), an outer ring a, and by the balls 0, the bearing being, according to the method of employing it, either a supporting means or a running device. In the case here illustrated by way of example the devices f, consisting of felt or other similar material, are'insertedinto a wire coil or helical spring 6, which at each of its extremities carries an-end plate d. Between the piece or section of felt and the protecting coil or spring 6 is placed an invert- .ed-trough-shaped body 9 g g composed of material impermeable or almost impermeable to oil. Said trough being inverted is more or less open at its bottom, so that after the intermediate pieces or sections of felt are inserted they are covered upon the-upper or outer rimming-surface, but are more or less uncovered toward the bqttom or inner run ning-surface. This arrangement is made for the purpose of, on the one hand, preventing the oil of the feltfrom being thrown off by centrifugal force and, 011 the other hand, of permitting. the felt or the like material to soak u oil.

The trough-shaped body 9 (shown in Figs. 1 to 7) is considerably open at its bottom, so that the piece or-section of felt of the inner running-surface provides a correspondingly large surface for soaking up the oil.

LIO'

Figs. 8 to 10 represent a tro'ughg, which is almost closed, so"'that the lower aperture forms a somewhat narrow slot, showing only a small part of the felt free to soak up the oil. Generally speaking, it is always advisable to cover the felt with the trough-shaped body at least around half its circumference. In certain cases, however, one or more'apertures h of small diameter may be provided at'the upper part of the trough g in order to permit oil to pass'through the top, as shown at Figs. 1]. to 13. The material of the bodies 9 g 51 may be of any suitable kind-as,for instance, sheet-zinc, celluloid, woven fabric, or the like. In some cases textile material varnished or rendered oilqproof, vegetable fibers, paper, and the like can also be employed. The hearing may be assembled by means of fill.ingrecesses provided in the side of one of the rings or by an eccentric disposition of the rings, as described in my application, Serial No. 194,894, tiled February 23, 1904, or in any other suitable way. The absorbent material may be readily compressed sufiiciently to introduce it into the protectors g and g The protectors gmust be formed about the absorbent material or mustbe flexible, sothat they be distorted. to introduce the absorb ent material through the normally narrow slit provided. It the speed or number of revolutions are not very great, the bodies-g may be I dispensed with.

The present patent is limited to the invengames tion of the protectors described, the compressible lubricating devices being claimed in my application Serial No. 220,653, above referred to.

Having now particularly described and ascertained the nature of the said invention and in what mannerthe same is to be performed, I declare that what I claim is 1. A ball-bearing including in combination balls and separating devices between said balls, the intermediate port-ionsof said ballseparating devices being of material capable of absorbing and gradually releasing a lubricant, said intermediate portions being combined with protectors, and with end plates separating the same from the balls.

2. A ball-bearing including in combination balls and separating devices between said balls, the intermediate portions of said ballscparating devices being of material capable of absorbing and gradually releasinga lubricant, said intermediate portions being combined with protectors for their outer parts consisting essentially of inverted troughs approximately oi lproof at the outer side to prevent the oil being thrown as by centrifugal force, and open at the inner sideto permit absorption of oil. V

ROBERT CONRAD.

Witnesses: I

HENRY HAsrnR, WOLDEMAR 'HA P'r. 

